diff --git a/config.toml b/config.toml
index bab2f943..8baec244 100644
--- a/config.toml
+++ b/config.toml
@@ -27,6 +27,7 @@ feedLimit = 32
 recentTagYears = 3
 icon = "/icon-512x512.png"
 favicon = "/icon-64x64.png"
+octothorpes = true # https://octothorp.es
 
 [params.mastodon]
 url = "https://xoxo.zone/@theory"
diff --git a/themes/justatheory/layouts/partials/header.html b/themes/justatheory/layouts/partials/header.html
index 71230809..628d1f9e 100644
--- a/themes/justatheory/layouts/partials/header.html
+++ b/themes/justatheory/layouts/partials/header.html
@@ -14,7 +14,11 @@
 	<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32x32.png" />
 	<link rel="icon" type="image/png" sizes="16x16" href="/favicon-16x16.png" />
 	<link rel="manifest" href="/site.webmanifest" />
-	<link rel="mask-icon" href="/safari-pinned-tab.svg" color="#2d2d2d" />
+	<link rel="mask-icon" href="/safari-pinned-tab.svg" color="#2d2d2d" />{{ if and .Site.Params.octothorpes .Params.tags }}
+	<link rel="preload" as="fetch" href="https://octothorp.esc/?{{ .Permalink }}" />
+	{{- range .Params.tags }}
+	  <link rel="octo:octothorpes" href="{{ . | urlize }}" />
+	{{- end }}{{ end }}
 	{{- with .Site.Params.mastodon.url }}
 	<link rel="me" href="{{ . }}" />
 	{{- end }}